Total Control — Gillian Cross

Everyone is good at something. But at Lizzie's school this has been taken to extremes. Her classmate Ethan, who previously had no interest in sport, is now incredible at football; her brother's suddenly an expert in robotics; and Lizzie has become really good at being bad. But when she tries to remember what awful thing she's just done, all she has is a blank space in her mind.
How come they've suddenly changed so much? And why can't they talk about it? It's as though they have no power over their own actions. Could this be something to do with the mysterious new headmaster . . . ?
Surrender yourself to the new hypnotic spell of the Demon Headmaster, with new kids, a new school, and a new thrilling scheme for world domination. Fast paced and action packed adventure, written by the award-winning Gillian Cross. Resistance is not an option.